Phosphorus recovery from sewage sludge char ash

Atienza-Martínez, María; Gea, G.; Arauzo, J.; Kersten, Sascha R.A.; Kootstra, A.M.J.

doi:10.1016/j.biombioe.2014.03.058

Cited by 102 publications

(75 citation statements)

References 43 publications

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“…The most interesting is the phosphate of calcium and magnesium as a low-solubility mineral named whitlockite. The presence of whitlockite mineral in sewage sludge ashes was confirmed by [17,18]. Although the sewage sludge was oxy-combustion and the concentration of CO2 was higher than air combustion the carbonates are not detected.…”

Section: Resultsmentioning

confidence: 87%

Analysis of sewage sludge ashes from air and oxy-fuel combustion in a circulating fluidized-bed

et al. 2016

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Abstract. The ashes from sewage sludge combustion in air versus O2/CO2 atmospheres with oxygen concentrations in the range of 21-40% vol. at temperature of 850°C in a 12 kW bench-scale CFB combustor were characterised. The chemical and phase composition of ashes were studied by XRF and XRD. The morphology of studied ashes were examined by SEM method. The slagging and fouling indices were calculated to study the deposition tendencies of ash. The thermal behaviour of ashes was studied by TG-DSC techniques, focusing on the mass loss and thermic effects with the increasing of temperature up to 1200C.

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Section: Resultsmentioning

confidence: 87%

Analysis of sewage sludge ashes from air and oxy-fuel combustion in a circulating fluidized-bed

et al. 2016

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“…Viader et al . () observed an extremely small acid solubility in the same sewage sludge ash as used in the present study and concluded that P solubility in sludge gasification ash is probably governed mainly by Fe(III), in contrast to incineration ash where the trivalent iron phosphate bonds originally present are broken (Atienza–Martínez et al ., ). The alkaline solubility was larger in gasification compared to incineration sludge ash (Viader et al ., ), which suggests a greater P fertiliser value in alkaline pH soils than in the slightly acidic soil used in the present study.…”

Section: Discussionmentioning

confidence: 97%

Phosphorus bioavailability in ash from straw and sewage sludge processed by low‐temperature biomass gasification

Müller-Stöver

Jakobsen

Grønlund

et al. 2018

Soil Use and Management

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Reuse of phosphorus (P) from waste streams used for bioenergy conversion is desirable to reduce dependence on nonrenewable P resources. Two different ash materials from low-temperature biomass gasification of wheat straw and sewage sludge, respectively, were investigated with regard to their P bioavailability. A set of pot experiments with spring barley was carried out to compare the ash P fertiliser value with mineral P fertiliser and the sewage sludge feedstock. An indirect radioactive labelling approach with 33 P was used to determine the amount of P taken up from the fertiliser materials. Depending on the application rate, straw gasification ash produced a fertiliser response comparable to mineral P. However, P uptake from the ash was generally less than uptake from equivalent amounts of mineral P, and the calculated relative effectiveness was 44% after 6 weeks of plant growth. In contrast, the P fertiliser value of Fe-rich sewage sludge after low-temperature gasification was practically zero. These results suggest that ash from low-temperature gasification could be developed into alternative P fertilisers; however, as the P bioavailability depends greatly on the feedstock used, a greater emphasis on feedstock composition is required.

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“…Quartz and hematite have been identified as the most abundant minerals in SSA, whilst many other iron oxides, iron phosphates, calcium phosphates and aluminium phosphates have been reported to a lesser degree [3][4][5][11][12][13]16,21,24,[29][30][31][32][43][44][45]51,58,59,64,68,74,76,77,79,94,95,99,102,[105][106][107][108][109][110]. The amorphous content of SSA ranged from 35-75%, which suggests that the material is somewhat reactive and, when ground sufficiently fine, may have potential as a cement component.…”

Section: Mineralogymentioning

confidence: 99%